Collins, A. C. The story of america in pictures: With an introduction by claude g.browers (New revised edition.). New york.
Citazione stile Chigago Style (17a edizione)Collins, Alan C. The Story of America in Pictures: With an Introduction by Claude G.browers. New revised edition. Garden City: New york.
Citatione MLA (9a ed.)Collins, Alan C. The Story of America in Pictures: With an Introduction by Claude G.browers. New revised edition. New york.
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